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Finding the Fourth Proportional to 886.90, 1,324.54 and 755.50

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Solution

The fourth proportional to 886.90, 1,324.54 and 755.50 is: 1,128.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.90 : 1,324.54 = 755.50 : x
  2. Step 2: Convert to fraction form
    886.90/1,324.54 = 755.50/x
  3. Step 3: Cross multiply
    886.90x = 1,324.54 × 755.50
  4. Step 4: Simplify right side
    886.90x = 1,000,689.97
  5. Step 5: Solve for x
    x = 1,000,689.97/886.90
  6. Step 6: Final answer
    x = 1,128.30

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.